Attachment for gear-cutting, planing, and milling machines.



No. 883,952. A PATENTEI) APB.. 7, 1908.

S. A. H AND. ATTACHMENT EUR GEAR CUTTING, ILANING, AND MILLING MACHINES.

APPLICATION FILED AUG. 26,1907.

2 SHEETS-TSHEETI.

TIIIIII 3f@ I BY MMATTYS PATENTED APR. 7, 1908.

vS.A.HAND. V ATTAGHMBNT PoR GEAR-CUTTING, PLANING, AND MILLING MACHINE-s.

APPLICATION ILED AUG. 26, 19Q7.

2 SHEETS-SHEET 2.

I NVE NTOR ATTEST i SamuelAJul BY 'ATTYS me mams sn-Rs co.. wAsHmm-mv. n, c.

UNITED STATES PATIENT OFFICE.-

SAMUEL A. HAND, OF CLEVELAND, OHIO, ASSIGNOR TO THE CHANDLER d: PRICE COMPANY, OF CLEVELAND, OHIO, A CORPORATION.

Application filed August 26, 1907.

Specification of Letters Patent.

Patented April '7, 1908.

Serial No. 390,084.

T o all 'whom it may concern:

Be it known that I, SAMUEL A. HAND, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Attachments for Gear-Cutting, Planing, and Milling Machines, and do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to Which it appertains to make and 'use the same.

My invention relates to an attachment for gear-cutting, planing and milling machines and the like wherein the work is liable to chatter or vibrate under the effect of the cutting tool and thus also cause the work to be rough and defective, all substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation of a gear cutting machine having my invention operatively incorporated therewith, and Fig. 2 is a cross sectional elevation on a line corresponding substantially to 2-2, Fig. l. Fig. 3 is an enlarged sectional elevation of the immediate and certain associated parts of the rest, as hereinafter fullydescribed. Fig. 4 is an elevation of a milling machine, showing several applications of my invention, and Fig. 5 is a view at right angles to Fig. 4. t

Reduced to its essential characteristics or parts the invention is more or less fully disclosed in Fig. 3, and the other views serve rather to show the range of its application and methods of use, the idea in all cases being to take up slack, s ring, or vibration in the stock or Work acte u on by the cutter and which manifests itself 1n chattering noise and eiects. Hence, I do not place any special stress on the kind of machine or the manner of its o eration, nor upon the character of the worr done provided the machine and Work be adapted to utilize my improvement for the purposes specified.

Now, having reference to Fig. 3, c represents a rigid and h xed part of machine frame C, considered as a Whole, and D is the supporting member of the attachment which is removably fixed in this particular frame by nuts 3 engaging the threaded shank of said support and locking it irrnly in lace. The sal support has a head 2 Wit a face 4 slightly inclined transversely from a right angle to the axis of said support and provided with a dove-tailed rib 5 centrally of said face, and a substantially wedge shape tightening block 6 has a dove-tailed groove or channel matching said rib and adapted to slide thereon. Said block has its inner side inclined sufficiently to make up for the lateral inclination of face 4, so as to bring the outer bearing side or surface thereof exactly square with the axis of support D. Said block is held in working Iposition by its dove tailed engagement wit head 2 and a headed stem or rod 7 threaded into the reduced or narrower end of said block and supported in a plate or projection 8 iixed on head 2 adapted to extend across the end of said block. A s iral spring 10 is engaged about said rod 7 etween its head and projection 8 and adapted to draw upon said block in its wedging or tightening direction and thus tighten it more and'v more against the work as the block is drawn further in by spring l0.

The stock or material worked upon in cutting or milling is represented by S in the several figures, and the tool by T, which may be fed to the stock or the stock to the tool, according to the machine. In the gear cutting arrangement, Figs. l and 3, the attachment is removably fixed upon main frame C, or a part rigid therewith, in such relation that the hat outer surface of wedge or block 6 will bear with its full face against the side of the stock or gear and with the parts in such adjustment relatively that there will be plenty of tightening room in said block under the tension of spring 10 to take up allvibrations induced by the cutting tool and hold the stock perfectly firm and rigid, thus preventing the usual chattering and quieting the operation. This also and obviously enables the cutting tool to do smooth and accurate work, which is one of the material advantages of the invention. The same effect is obtained when the device is placed in such working relation as is disclosed in Figs. 4 and 5, wherein it comes beneath the Work or plate, and is somewhat differently supported on frame C from that above described. Obviously, also, the invention is complete as an article of manufacture and is available as such to be used here or there according to the style of machine.

I have described head 2 and block 6 as having slid able engagement with a rib on one and channel in the other, but these may be reversed as to said parts and serve the same purpose, and any equivalent of said connections may be substituted therefor, the essential idea being that block or wedge 6 should be confined in slidable relations on said head and started in such position in respect to the Work that it will have all the needed take-up when the work begins. Adjustment by nuts 3 iiXes initial relations, and the point of engagement is approximately opposite the tool, allowing for clearance.

Obviously, chattering is prevented by spring l() taking up wedge or key 6 as vibrations occur and thus locking the wedge s0 tightly upon the stock that chattering is prevented. 4

Vhat I claim is:-

1. A device to prevent chattering in gear cutting and other machines, comprising a supporting member provided with a screw threaded shank and nuts thereon to adjustably iiX the same on a support and said device having an inclined outer face, a substantially wedge shaped block slidably engaged on the face of said device, a headed stem engaged in the narrower end of said block and supported from said device, and a spring about the outer portion of said stem beneath the head thereon to tighten the said block.

2. The combination of a gear cutting or other machine with an attachment adjustably IiXed thereon and adapted t0 prevent chattering in the cutting operation, said attachment having a screw threaded shank adapted to fasten the same and a head with an outer transversely inclined face, a substantially wedge shaped block having dovetailed slidable engagement with said head, and means to normally draw said block into tightening position comprising a headed stem lixed in said block, a spring support fixed on said head and a spring engaged about said stem and resting on said support.

In testimony whereof I sign this specification in the presence of two witnesses.

SAMUEL A. HAND.

`Witnesses z Y R. B. MOSER, F. C. MUssUN. 

